Late Holocene relative sea-level changes and reconstruction of paleoenvironment by diatom fossil assemblage analysis in Akkeshi Moor, Hokkaido, northern Japan

Y. Sawai, K. Kashima

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5 Citations (Scopus)

Abstract

Paleoenvironmental surveys, using diatom assemblage analysis, have been carried out in Akkeshi Moor and its surroundings to obtain records of Holocene sea-level changes. Fossil diatom assemblages and radiocarbon ages of drilled core samples from three sites in the moor were examined, demonstrating relative sea-level fluctuations during the last five thousand years, with the following sequence of events: a shallow bay spread over most of Akkeshi Moor, with gregarious oysters around the moor (ca. 4700 yr B.P.); the sea-level dropped to about 1 meter below the present level (ca. 2700 yr B.P.); the sea-level then rose to about 1 meter above the present level (ca. 1000 yr B.P.). Moor vegetation formed after this transgression.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalFossils
Volume61
Publication statusPublished - Dec 1 1996

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fossil assemblage
paleoenvironment
sea level change
diatom
Holocene
sea level
transgression
analysis
moor
fossil
vegetation

All Science Journal Classification (ASJC) codes

  • Palaeontology

Cite this

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AB - Paleoenvironmental surveys, using diatom assemblage analysis, have been carried out in Akkeshi Moor and its surroundings to obtain records of Holocene sea-level changes. Fossil diatom assemblages and radiocarbon ages of drilled core samples from three sites in the moor were examined, demonstrating relative sea-level fluctuations during the last five thousand years, with the following sequence of events: a shallow bay spread over most of Akkeshi Moor, with gregarious oysters around the moor (ca. 4700 yr B.P.); the sea-level dropped to about 1 meter below the present level (ca. 2700 yr B.P.); the sea-level then rose to about 1 meter above the present level (ca. 1000 yr B.P.). Moor vegetation formed after this transgression.

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